Pattern for sheaves or pulleys



Jan. 10, 1933. FRICK ET AL 1,893,583

PATTERN FOR SHEAVES OR PULLEYS Filed Oct. 3, 1931 5 Sheets-Sheet 1 EMORYJJS FRICK. CLARENCE N. Ec El...

INVENTORS Jan. 10, 1933. FRlcK ET AL 1,893,583

PATTERN FOR SHEAVES OR PULLEYS led Oct. 3, 1931 3 Sheets-Sheet 2 EMo Y m; FRICK CLARENCE N- Ec EL,

INVENTORS A TTORNE Y Jan. 10, 1933.

E. H. FRICK ET AL PATTERN FOR SHEAVES OR PULLEYS .Fi led Oct. 5, 1931 5 Sheets-Sheet INVEMORS A 2 ORNEY Patented Jan. 10, 1933 UNETED STATES PATET OFFCE EMORY H. ERICK AND GLABENCE N. ECKEL, F CENCINNATI, OHIO, ASSIGNOES TO WORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEVJ' YORK, N. Y., A

CORPORATION OF VIRGINIA PATTERN FOR SHEAVES 0R PULLEYS Application filed October 3, 1931.

This invention relates to patterns for making molds in foundry work, and an object of the invention is to provide an adjustable pattern the use of which permits the molding of a large variety of pulleys or sheaves of various diameters, rim widths and rim thicknesses, in conjunction with a number of dif ferent arm and hub sizes, and one which will effect substantial economies in small volume production.

Another object of the present invention is to provide a pattern structure as specified, which is relatively simple in construction and operation, permitting change or adjustment, for molding sheaves or pulleys of the various characteristics above-mentioned, in a relatively short time, and one which will greatly reduce the number of patterns necessary for making the various sizes of sheaves or pulleys, thereby materially reducing the cost of manufacture of such pulleys or sheaves.

More specifically, the present invention comprehends the provision of a master pattern structure, embodying rim patterns of various diameters and of a width to provide the widest face of pulley or sheave desired, and means for adjusting the position of the rim pattern with respect to the parting plane of the mold, for providing the desired width of the pulley or sheave rim, means for locking the rim pattern in adjusted positions, adjustable means for clamping of a flash of the proper size about the pattern, as well as novel structures of hub and spoke patterns, whereby the length of the sp olres may be regulated in proportion to the diameter of the rim pattern used; thus permitting the use of relatively few patterns or pattern sections, for providing a large variety of sizes of pulleys or sheaves.

lVith these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a pattern for sheaves or pulleys of the preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

Serial No. 566,714.

In the drawings:

1 is a view, partly in side elevation and partly in section, of the improved pattern.

Fig. 2 is a vertical section through the improved pattern.

Fig. 3 is a fragmentary top plan of the pattern, having parts broken away.

Fig. 4 is a fragmentary side elevation of the improved pattern.

5 is a fragmentary section of the pattern, showing it in a different adjusted position from that shown in Fig. 2.

Referring more particularly to the drawings, the improved pattern comprises a bottom plate 1, which is adapted to rest-upon the rollover table A of a molding machine of approved type, or upon a molders bench, depending upon the type of equipment of the foundry in which the pattern is used.

A top ring 2 is supported from the bottom ring 1 bystruts 3, which are reinforced by suitable webbing 1-, a drum 5 is centrally mounted upon the bottom plate 1, and has a reinforcing ring 6 mounted upon its upper end, for reinforcing the pattern plate 7. The pattern plate 7 is made light to facilitate its handling.

A rim pattern 8 of predetermined diameter, and of the diameter of the pulley or sheave desired, is positioned about the pattern plate 7, and rests upon the elevator plate 9, being anchored to the elevator plate by suitable pins 10, which extend through the proper openings 11 of the series of openings in the elevator plate. The series of openings 11 are provided to accommodate rim patterns 8 of different diameters. The elevator plate 9 has a nut 12 attached thereto, which cooperates with the threads 13 on the perimeter of the drum 5, and by rotating the rim pattern 8 the plate 9 and consequently the rim pattern may be raised or loweredwith respect to the pattern plate 7, depending upon the direction of rotation of the pattern 8, for regulating the amount of the pattern 8 which projects above the pattern plate 7, and consequently for regulating the width of the rim of the sheave or pulley to be cast from the mold formed by the pattern. The drum 5 has gibs 14 carried thereby, which are guided in their vertical movement by guide screws 15. When the pattern 8 has been adjusted to the desired height with respect to the pattern plate 7, the gibs 14 are forced downwardly by the lock screws 16 for locking the nut 12 in its adjusted position upon the drum 5, and

for preventing accidental displacement of the rim pattern 8.

After the rim pattern 8 has been properly adjusted, the hub pattern 17 is positioned or placed upon the pattern plate 7, it being understood that the hub pattern 17 corresponding to the size of hub desired, as well as to the size or" the pulley or sheave to be cast, is used. The hub pattern 17 has arm half patterns 18 attached thereto, and radiating therefrom, for forming the arms or spokes of the pulley or sheave. The arm half patterns 18, which are attached to the hub pattern 17, form only a part of the arms of the mold, and the arm patterns are completed by removable end pieces 19, which fit against the inner surface of the rim pattern 8, and terminate inwardly at the inner terminals of the fillets 20, as clearly shown in Fig. 3 of the drawings. In instances where the pulley diameter is greater than the combined lengths of the arm half patterns 18 of the end sections 19, removable segments 21 are employed to form the part of the arm pattern between the facing ends of the patterns 18 and end pieces 19.

Itwill be seen that by providing segments 21 of various lengths. the same hub and end iieee patterns may be used in connection with rim patterns of various diameters.

After the rim pattern 8 has been properly adjusted, and the proper hub and arm patterns placed upon the pattern plate 7, the

ask. as indicated at 23, is positioned upon the filler rings 24. The filler rings 24 are placed upon the impact blocks 25 to fill in the space between the outer surface of the rim pattern 8 and the outer ring 2. The flask 23 is properly positioned by means of flask pins 26, and it is securely held in position by clamps 27 which engage over the flange 28 and the flask 23. The clamps 27 are carried by carrying bolts 30, the heads 31 of which travel in dovetailed guides 32. The dovetailed guides 32 are suitably supported from, or attached to. the bottom plate 1. and extend radially therefrom. The clamps 27 are tightly clamped against the flanges 28, of the flask 23, by means of the nuts 33. The clamps 27 and their carrying bolt-s move in slots 34 in the top ring 2, and their outward movement is limited by stop-bars 35 which are attached by suitable bolts 36 to the guides 32. The clamp-carrying bolt 30 is supported in suitable guides 37 which are attached to impact blocks 38. The impact blocks 38 also move radially of the axis of the pattern with the clamps 27, and are so positioned with relation to the clamps that they will be positioned directly beneath the flask during the tamping of sand in the flask, as clearly shown in Fig. 2 of the drawings, thereby providing firm supports for the flasks and strengthening the pattern structure.

hen it is desired to cast pulleys or sheaves of lar er diameters, such as shown in Fig. 5 of the drawings, a flange pattern 8 of greater diameter is used, in lieu of the flange pattern 8, and all that is necessary to adapt the pattern to such larger pulleys or sheaves, is to remove the pins 10 and disconnect the smaller flange pattern from the elevator ring 9, and replace it with the flange ring 8 of the desired diameter, which is attached to the elevator ring by the pins 10, and substitute longer segments 21 in the arm half patterns 18 or, if a larger hub is desired, then substitute a larger hub pattern for the one previously used, adjust the elevator ring to the proper position to regulate the width of the pulley or sheave flange, lock it in such adjusted position, place the flask as indicated at 28 in its proper position, and proceed with t iemaking of the mold in the usual manner. hen the largest flask and rim pat-tern for which the master pattern is designed, is used, then the webs or struts t serve as impact or strengthening supports for the top ring 2, as shown in Fig. 5 of the drawings.

It is understood that only one-half of the complete mold is made at a time, with the improved pattern, in the half flask, but no adjustment is necessary to make the second half in a second flask pattern.

From the foregoing description, taken in connection with the accompanying drawings, it will be apparent that a pattern structure has been provided which will require only a minimum number of patterns for making molds for casting many different sizes and styles of sheaves or pulleys. For example, only one rim pattern is provided for every sheave or pulley of that diameter, regardless of the width of the pulley or sheave face, and regardless of the hub characteristics thereof. Also, only one hub and arm halt pattern is required for all different diameters of pulley or sheave requiring the same hub construction, it only bein necessary to provide different lengths of the very simple, inexpensive, segmental patterns 21. The improved pattern structure not only very materially reduces pattern costs, and the costs of pattern storage, but it also very materially decreases the amount of time necessary for making sheaves or pulleys in different sizes. For example, it is desired to make eight-inch pulleys with two, four and six-inch face widths. It is only then necessary to rotate the rim pattern 8, to adjust it to another width of face, after the molds have been made for the number of pulleys or sheaves desired, of one of the face widths, thereby eliminating a active width of the rim pattern with respect to said pattern plate, flask clamps carried by said supporting structure, and means for locking said adjustable means, said flask clamps being adjustable vertically and horizontally with respect to said supporting structure to permit their adjustment to cooperate with different sized flasks.

2. In a pattern for making sheave or pulley molds, a supporting structure, a pattern plate removably mounted on said supporting structure, a rim pattern, adjustable means supporting said rim pattern for adjusting the active width of the rim pattern with respect to said pattern plate, flask clamps carried by said supporting structure, means for locking said adjustable means, said flask clamps being adjustable vertically and horizontally with respect to said supporting structure to permit their adjustment to cooperate with different sized flasks, impact blocks adjustably carried by said supporting structure, and stop means for limiting the adjusted movement of said flask clamps and impact blocks.

3. In a pattern for making sheave or pulley molds, the combination of a supporting structure including a centre drum, a pattern plate supported upon said drum, a rim pattern adjustably carried by said drum, and hub and arm patterns carried by said pattern plate.

4:. In a pattern for making sheave or pulley molds, the combination of a supporting structure including a centre drum, a pattern plate supported upon said drum, a rim pattern adiustably carried by said drum, and iub and arm patterns carried by said pat tern plate, said arm patterns being composed of a major portion attached to said hub pattern, end pieces, and removable segment-s between said end pieces and hub-carried sections.

5. In a pattern for making sheave or pulley molds. a supporting structure, a centre drum carried thereby, an elevator plate adjustably carried by said drum, rim pattern removably supported upon said elevator plate. and means for adjusting the position of said elevator plate.

6. In a pattern for makingsheave or pulley molds, a supporting structure, a centre drum carried thereby, an elevator plate, a rim pattern removably carried by said elevator plate, and a nut on said elevator plate, said drum being provided with threads cooperating Wlbh said nut to adjust the position of said elevator plate and the active mold forming width of said rim pattern. I

7. In a pattern for making sheave or pulley molds, a supporting structure, a centre drum carried thereby, an elevator plate, a rim pattern removably carried by said elevator plate, a nut on said elevator plate, said drum being provided with threads cooperating with said nut to adjust the position of said elevator plate and the active mold forming width of.

said rim pattern, a locking gib carried by said drum, and a lock screw for moving said gib into locking position.

8. In a pattern for making sheave or pulley molds, a supporting structure, a centre drum carried thereby, an elevator plate, a rimlpattern removably carried by said elevator plate, a nut on said elevator plate, said drum being provided with breads cooperating with said nut to adjust the position of said elevator plate and the active mold forming width of said rim pattern, a pattern plate supported by said drum within said rim pattern, and an arm and hub pattern removably supported upon said pattern plate.

9. In a pattern for making sheave or pulley molds, a supportin structure, a centre drum thereon provided with screw threads, an elevator plate, a nut on said elevator plate engaging the threads upon the drum to permit adjusted positions of the elevator plate, a rim pattern removably carried by said elevator plate, filler rings carried by said supporting structure outwardly of said rim pattern, flask-clamping means adjustably carried by said support for movement radially or" the axis of the support and for vertical movement into and out of flask clamping positions.

10. In a pattern for making sheave or p-ulr;

ley molds, a supporting structure, a centre drum thereon provided with screw threads, an elevator plate, a nut on said elevator plate engaging the threads upon the drum to permit adjusted positions of the elevator plate,

a rim pat-tern removably carried by said elevator plate, filler rings carried by said supporting structure outwardly of said rim pattern, flask-clamping means adjustably carried by said support for movement radially of the f axis of the support and for vertical movement into and out of flask-clamping positions, and means for locking said elevator plate in adjusted positions, said elevator plate being provided with a. plurality of anchor pin receiving openings whereby rim patterns of different diameters may be mounted upon the elevator plate.

11. In a pattern for making .sheave or pulley molds, a supporting structure, a centre drum thereon provided with screw threads, an elevator plate, a nut on said elevator plate engaging the threads upon the drum to permit adjusted positions of the elevator plate, a rim pattern removably carried by said elevator plate, filler rings carried by said supporting structure outwardly of said rim pattern, flask-clamping means adjustably carried by said support for movement radially of the axis of the support and for vertical movement into and out of flask-clamping positions, means for looking said elevator plate in adjusted positions, said elevator plate being provided with a plurality of anchor pin receiving openings whereby rim patterns of different diameters may be mounted upon the elevator plate, a pattern plate supported above said drum, and hub and arm patterns mounted upon said pattern plate.

12. In a pattern for making sheave or pulley molds, a supporting structure, a rim pattern, adjustable means supporting said rim pattern for adjusting the active width thereof, flask clamps carried by said supporting structure, impact blocks carried by said supporting structure, said flask clamps being connected to said impact blocks, and said im pact blocks and flask clamps being adjustable radially of the axis of the supporting structure.

13. In a pattern for making sheave or pulley molds, the combination with a flask, of a supporting structure, a rim pattern, adjustable means supporting .said rim pattern for adjusting the width thereof, impact blocks adjutably carried by said supporting structure for adjustment radially of the axis of the pattern to position the impact blocks directly beneath the flask, and flask clamps adjustably carried by said impact blocks and movable with the blocks.

14. In a pattern for making sheave or pulley molds, a supporting structure, a center drum carried thereby, an elevator plate, a rim pattern removably carried by said elevator plate, said drum being provided with threads, a nut on said elevator plate cooperating with said drum-carried threads, said drum being provided with a recess, a locking gib in .said recess and provided with threads aligning with and continuing said drum-carried threads, anda lock screw for moving said gib and looking it in locking position.

15. In a pattern for making sheave or pulley molds, a supporting structure, a center drum carried thereby, an elevator plate, a rim pattern removably carried by said elevator plate, said drum being provided with threads, a nut on said elevator plate cooperating with said drum-carried threads, said drum being provided with a recess, a locking gib in said recess and provided with threads aligning with an continuing said drum-carried threads, and a lock screw for moving said gib and locking it in looking position, said eletures.

EMORY H. FRICK. CLARENCE N. ECKEL. 

